# Population (1 January) — Siena (NUTS-3 ITI19)

Population (1 January) — Siena (NUTS-3 ITI19) was 259,460 persons in 2025, down 0.2% from 2024.
That is the lowest reading since 2005.
Over the past ten years it has ranged from 259,460 persons (2025) to 269,912 persons (2015), averaging 264,457 persons.

- Source agency: Eurostat (Statistical Office of the European Union)
- Makrognosis code: `IT-I19.POP.A.NSA`
- Frequency: annual
- Units: persons
- Coverage: 1990-01-01 to 2025-01-01 (28 observations)
- Page: https://makrognosis.robomacro.com/data/italy/population-1-january-siena-nuts-3-iti19

## Recent data

| Period | Value |
|---|---:|
| 2025 | 259,460 persons |
| 2024 | 259,992 persons |
| 2023 | 260,557 persons |
| 2022 | 261,209 persons |
| 2021 | 263,801 persons |
| 2020 | 265,179 persons |
| 2019 | 266,033 persons |
| 2018 | 266,880 persons |
| 2017 | 267,330 persons |
| 2016 | 268,679 persons |
| 2015 | 269,912 persons |
| 2014 | 270,705 persons |
| 2013 | 271,056 persons |
| 2012 | 271,065 persons |
| 2011 | 270,689 persons |
| 2010 | 269,591 persons |
| 2009 | 267,905 persons |
| 2008 | 264,790 persons |
| 2007 | 261,460 persons |
| 2006 | 260,489 persons |
| 2005 | 259,324 persons |
| 2004 | 256,887 persons |
| 2003 | 253,763 persons |
| 2002 | 252,226 persons |

## API

```
curl -H "X-API-Key: $MAKROGNOSIS_KEY" \
  "https://makrognosis.robomacro.com/v1/series/IT-I19.POP.A.NSA"

# Python
import requests
r = requests.get("https://makrognosis.robomacro.com/v1/series/IT-I19.POP.A.NSA",
                 headers={"X-API-Key": KEY})
obs = r.json()["observations"]
```